Two ways to change the energy of a system; First law of thermodynamics; Specific heat
You pour 250 g of tea into a Styrofoam cup, initially at 80 °C, and stir in a little sugar using a 100-g aluminum 20 °C spoon and leave the spoon in the cup. What is the highest possible temperature of the spoon when you finally take it out of the cup? What is the temperature of the tea at that time? What assumptions did you make to answer the questions?
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